CRIS: Minor fixes to mm/fault.c
[linux-2.6.git] / arch / cris / mm / ioremap.c
index 6b9130bfb6c1b4d1070e55b862a6de7a73032066..8b0b9348b574c17bb91c2cc0703a99c4f0dbe026 100644 (file)
  */
 
 #include <linux/vmalloc.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/pgalloc.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-
-extern inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
-       unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end;
-
-       address &= ~PMD_MASK;
-       end = address + size;
-       if (end > PMD_SIZE)
-               end = PMD_SIZE;
-       if (address >= end)
-               BUG();
-       do {
-               if (!pte_none(*pte)) {
-                       printk("remap_area_pte: page already exists\n");
-                       BUG();
-               }
-               set_pte(pte, mk_pte_phys(phys_addr, __pgprot(_PAGE_PRESENT | __READABLE | 
-                                                            __WRITEABLE | _PAGE_GLOBAL |
-                                                            _PAGE_KERNEL | flags)));
-               address += PAGE_SIZE;
-               phys_addr += PAGE_SIZE;
-               pte++;
-       } while (address && (address < end));
-}
-
-static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
-       unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end;
-
-       address &= ~PGDIR_MASK;
-       end = address + size;
-       if (end > PGDIR_SIZE)
-               end = PGDIR_SIZE;
-       phys_addr -= address;
-       if (address >= end)
-               BUG();
-       do {
-               pte_t * pte = pte_alloc_kernel(&init_mm, pmd, address);
-               if (!pte)
-                       return -ENOMEM;
-               remap_area_pte(pte, address, end - address, address + phys_addr, flags);
-               address = (address + PMD_SIZE) & PMD_MASK;
-               pmd++;
-       } while (address && (address < end));
-       return 0;
-}
-
-static int remap_area_pages(unsigned long address, unsigned long phys_addr,
-                                unsigned long size, unsigned long flags)
-{
-       int error;
-       pgd_t * dir;
-       unsigned long end = address + size;
-
-       phys_addr -= address;
-       dir = pgd_offset(&init_mm, address);
-       flush_cache_all();
-       if (address >= end)
-               BUG();
-       spin_lock(&init_mm.page_table_lock);
-       do {
-               pmd_t *pmd;
-               pmd = pmd_alloc(&init_mm, dir, address);
-               error = -ENOMEM;
-               if (!pmd)
-                       break;
-               if (remap_area_pmd(pmd, address, end - address,
-                                  phys_addr + address, flags))
-                       break;
-               error = 0;
-               address = (address + PGDIR_SIZE) & PGDIR_MASK;
-               dir++;
-       } while (address && (address < end));
-       spin_unlock(&init_mm.page_table_lock);
-       flush_tlb_all();
-       return error;
-}
+#include <asm/arch/memmap.h>
 
 /*
  * Generic mapping function (not visible outside):
@@ -107,9 +27,9 @@ static int remap_area_pages(unsigned long address, unsigned long phys_addr,
  * have to convert them into an offset in a page-aligned mapping, but the
  * caller shouldn't need to know that small detail.
  */
-void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot)
 {
-       void * addr;
+       void __iomem * addr;
        struct vm_struct * area;
        unsigned long offset, last_addr;
 
@@ -131,15 +51,37 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
        area = get_vm_area(size, VM_IOREMAP);
        if (!area)
                return NULL;
-       addr = area->addr;
-       if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
-               vfree(addr);
+       addr = (void __iomem *)area->addr;
+       if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
+                              phys_addr, prot)) {
+               vfree((void __force *)addr);
                return NULL;
        }
-       return (void *) (offset + (char *)addr);
+       return (void __iomem *) (offset + (char __iomem *)addr);
+}
+
+void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+{
+       return __ioremap_prot(phys_addr, size,
+                             __pgprot(_PAGE_PRESENT | __READABLE |
+                                      __WRITEABLE | _PAGE_GLOBAL |
+                                      _PAGE_KERNEL | flags));
+}
+
+/**
+ * ioremap_nocache     -   map bus memory into CPU space
+ * @offset:    bus address of the memory
+ * @size:      size of the resource to map
+ *
+ * Must be freed with iounmap.
+ */
+
+void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
+{
+        return __ioremap(phys_addr | MEM_NON_CACHEABLE, size, 0);
 }
 
-void iounmap(void *addr)
+void iounmap(volatile void __iomem *addr)
 {
        if (addr > high_memory)
                return vfree((void *) (PAGE_MASK & (unsigned long) addr));